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Use ISD::ADD instead of ISD::SUB with a negated constant. This

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avoids trouble if the return type of TD->getPointerSize() is
changed to something which doesn't promote to a signed type,
and is simpler anyway.

Also, use getCopyFromReg instead of getRegister to read a
physical register's value.

llvm-svn: 110835
This commit is contained in:
Dan Gohman 2010-08-11 18:14:00 +00:00
parent fa19084e79
commit d91d51116b
1 changed files with 5 additions and 4 deletions
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9
lib/Target/X86/X86ISelLowering.cpp
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@ -7210,12 +7210,13 @@ SDValue X86TargetLowering::LowerEH_RETURN(SDValue Op, SelectionDAG &DAG) const {
SDValue Handler = Op.getOperand(2);
DebugLoc dl = Op.getDebugLoc();
SDValue Frame = DAG.getRegister(Subtarget->is64Bit() ? X86::RBP : X86::EBP,
getPointerTy());
SDValue Frame = DAG.getCopyFromReg(DAG.getEntryNode(), dl,
Subtarget->is64Bit() ? X86::RBP : X86::EBP,
getPointerTy());
unsigned StoreAddrReg = (Subtarget->is64Bit() ? X86::RCX : X86::ECX);
SDValue StoreAddr = DAG.getNode(ISD::SUB, dl, getPointerTy(), Frame,
DAG.getIntPtrConstant(-TD->getPointerSize()));
SDValue StoreAddr = DAG.getNode(ISD::ADD, dl, getPointerTy(), Frame,
DAG.getIntPtrConstant(TD->getPointerSize()));
StoreAddr = DAG.getNode(ISD::ADD, dl, getPointerTy(), StoreAddr, Offset);
Chain = DAG.getStore(Chain, dl, Handler, StoreAddr, NULL, 0, false, false, 0);
Chain = DAG.getCopyToReg(Chain, dl, StoreAddrReg, StoreAddr);